通过边缘偏压和中性束注入增强场反向位形约束。

Field reversed configuration confinement enhancement through edge biasing and neutral beam injection.

机构信息

Tri Alpha Energy, Inc, PO Box 7010, Rancho Santa Margarita, California 92688, USA.

出版信息

Phys Rev Lett. 2012 Jun 22;108(25):255008. doi: 10.1103/PhysRevLett.108.255008. Epub 2012 Jun 21.

DOI:10.1103/PhysRevLett.108.255008

Abstract

Field reversed configurations (FRCs) with high confinement are obtained in the C-2 device by combining plasma gun edge biasing and neutral beam injection. The plasma gun creates an inward radial electric field that counters the usual FRC spin-up. The n = 2 rotational instability is stabilized without applying quadrupole magnetic fields. The FRCs are nearly axisymmetric, which enables fast ion confinement. The plasma gun also produces E × B shear in the FRC edge layer, which may explain the observed improved particle transport. The FRC confinement times are improved by factors 2 to 4, and the plasma lifetimes are extended from 1 to up to 4 ms.

摘要

C-2 装置通过结合等离子体枪边缘偏压和中性束注入获得了高约束的磁场反向位形（FRC）。等离子体枪产生了一个向内的径向电场，抵消了通常的 FRC 自旋转。在不施加四极磁场的情况下稳定了 n = 2 旋转不稳定性。FRC 几乎是轴对称的，这使得快离子约束得到了改善。等离子体枪还在 FRC 边缘层中产生了 E × B 切变，这可能解释了观察到的改进的粒子输运。FRC 的约束时间提高了 2 到 4 倍，等离子体的寿命从 1 毫秒延长到了 4 毫秒。